PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-21:43:00
G01     69.7           32.8               10.8 +/-    0.81      17.9 +/-    0.81  0.100 / 0.120
G07     138.0          30.6               12.7 +/-    1.40      22.0 +/-    1.40  0.130 / 0.100
G11     54.1           31.5               10.3 +/-    1.06      17.5 +/-    1.06  0.060 / 0.030
G13     273.7          37.3               12.3 +/-    3.07      18.7 +/-    3.07  0.050 / 0.050
G15     301.6          15.6                7.7 +/-    1.58      18.8 +/-    1.58  0.100 / 0.220
G17     233.2          64.9               12.8 +/-    0.99      14.0 +/-    0.99  0.090 / 0.190
G18     48.7           18.1               10.2 +/-    2.52      23.4 +/-    2.52  0.040 / 0.020
G19     225.0          42.1               13.4 +/-    1.73      18.9 +/-    1.73  0.030 / 0.020
G28     22.0           58.9                9.5 +/-    1.27      10.9 +/-    1.27  0.070 / 0.030
G30     136.3          58.9               12.8 +/-    0.62      14.7 +/-    0.62  0.070 / 0.040